Frame unit for truck bed cover



FIG. 1 is a rearward, downward perspective view of a frame unit for truck bed cover showing the new design;

FIG. 2 is a forward, downward perspective view thereof.

The broken line showing of a portion of a pickup truck is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a frame unit for truck bed cover, as shown and described. 